Improvement in corrugated metallic plates



N, PETERS, PHOTO-LITHOGRAPHER, wAsmNGTON. n c.

UNITED STATES PATENT OFFICE.

-RIGHARD MONTGOMERY, OF NEW-YORK, N. Y.

IMPROVEMENT IN CORRUGATED METALLIC PLATES.

Specification forming part of Letters Patent No. 56,779, dated July 31,1866.

To all lwhom 'it may concern:

Beit known that I, RICHARD MONTGOMERY. of the city and county of NewYork, in the State of New York, have invented a new andusefulimprovement in the method of strengthening rolled or hammeredplates or sheets of iron, steel, copper, and other metals; and I dohereby declare the following to be a full and exact description of thesaid invention, reference being had to the accompanying drawings, and tothe letters of reference thereon, the same forming a part of thisspecication.

The nature oimyinvention consists in doubly corru gati n g theplate-that is to say, in so bending the plates that the one series ofcontinuous bends or corrugations shall crossthe other 'similar series ofbends or eorrugations at right angles thereto.

In the drawings, Figure 2 is a View showing these corrugations in bothdirections; Fig. 3, a section thereof, showing the bend or corrugationin either direction 5 and Fig. l, the application of sheets of metalcorrugated in'this manner in the construction of -steamboilers. As thetwo latter are sectional views, of course only one series of thecorrugations can be shown by them.

Although I have in the drawings (Fig. l) shown this device as applied tothe inner and outer shell of the tire-chamber of the fire-box andboiler, as exemplifying its use for this purpose, it may be equally aswell applied to the lues and stacks or steamchimneys; nor do I confinemyself to any of these, but propose its use in any place or purposewhere such a structure may be deemed advisable.

In this invention I do not claim, broadly, bending corrugated platestransverseto the direction of the eorrugat-ions, nor do I claim plateswith alternate dish-like depressions and protuberauces on both sides;but

What` I do claim a srny invention, and desire to secure by LettersPatent of the United States, is l A plate or plates of rolled wroughtmetal doubly corrugated, substantially as described.

' RICHARD MONTGOMERY. Witnesses:

H. KING, W. BURRIs.

